Poll: Trump beats Warren, Biden in Iowa match-ups

President TrumpDonald John TrumpComey responds to Trump with Mariah Carey gif: 'Why are you so obsessed with me?' Congress to get election security briefing next month amid Intel drama New York man accused of making death threats against Schumer, Schiff MORE holds a slim lead in Iowa over former Vice President Joe BidenJoe BidenPoll: Bloomberg stalls after Vegas debate Bloomberg campaign: Vandalism at Tennessee office 'echoes language from the Sanders campaign and its supporters' Democratic strategist says Biden 'has to' get second place in Nevada MORE and Sen. Elizabeth WarrenElizabeth Ann WarrenPoll: Bloomberg stalls after Vegas debate Bloomberg unveils billboards to troll Trump ahead of campaign stops John Legend joining Warren in South Carolina next week: report MORE (D-Mass.) in hypothetical match-ups, according to a new poll.

The survey by Emerson College found that 51 percent of registered voters said they would choose Trump over Biden. Respondents favored Trump by the same 51 percent-49 percent margin in a match-up against Warren.

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The reverse was the case for Sen. Bernie SandersBernie SandersPoll: Bloomberg stalls after Vegas debate Prominent Texas Latina endorses Warren Bloomberg campaign: Vandalism at Tennessee office 'echoes language from the Sanders campaign and its supporters' MORE (I-Vt.). Fifty-one percent of voters said they would pick him over Trump, who garnered 49 percent support.

The results of all three match-ups fell within the poll's 3.2 percentage-point margin of error.

The survey also found Warren and Biden leading the Democratic field, tied at 23 percent support among Democratic caucusgoers. South Bend, Ind., Mayor Pete ButtigiegPeter (Pete) Paul ButtigiegPoll: Bloomberg stalls after Vegas debate Bloomberg campaign: Vandalism at Tennessee office 'echoes language from the Sanders campaign and its supporters' Buttigieg to join striking South Carolina McDonald's workers next week MORE was in third place with 16 percent, followed by 13 percent for Sanders.

Researchers surveyed 888 registered voters, including 317 Democratic caucusgoers, from Oct. 13-16. The Democratic caucusgoer responses have a margin of error of plus or minus 5.5. percentage points.

The Iowa caucus is scheduled for Feb. 3.